stylolite

[stahy-luh-lahyt]
noun Geology.
an irregular columnar structure in certain limestones, the columns being approximately at right angles to the bedding planes.

Origin:
1865–70; stylo-2 + -lite

stylolitic [stahy-luh-lit-ik] , adjective
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Collins
World English Dictionary
stylolite (ˈstaɪləˌlaɪt)
 
n
any of the small striated columnar or irregular structures within the strata of some limestones
 
[C19: from Greek stulos pillar + -lite]
 
stylolitic
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
stylolite   (stī'lə-līt')  Pronunciation Key 
A contact surface usually found between two calcareous rock layers, marked by a series of jagged interlocking up-and-down projections that resemble a suture or the tracing of a stylus. Stylolites are found in rocks that have been subjected to pressure and are formed by a process, called pressure dissolution, whereby insoluble material, such as clay and hydrocarbons, becomes concentrated along a surface while other more soluble material, such as calcite, is carried away.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Thin, closely spaced stylolite seams occur in zones rich in pyrite.
Mudstone is the dominant fabric for stylolite and fracture development.
The dissolution event post-dates all of the stylolite and fracture generations in this dolomite.
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